Packing-expanding device.



. No. 801,985. PATBNTED 0CT.1'7,1905. E. JOHNSON & W. MQDBRMQTT." I

PACKING EXPANDING DEVICE.

APPLICATION FILED JAN.12, 1905.

li lllll i ""1 1| i 25/636 eon as UNITED STATES PATENT OFFICE.

EADS JOHNSON, OF BAYONNE, NEWV JERSEY, AND WILLIAM MGDERMOTT, OF PORT RICH MOND, NEW YORK.

PACKING-EXPANDING DEVICE.

Specification of Letters Patent.

Patented Oct. 1'7, 1905.

Application filed nuary 12, 1905. Serial No. 240,699.

To a whom it may concern-.-

Be it known that we, EADS JOHNSON, of Bayonne, in the county of Hudson and State of New Jersey, and WVILLIAM MoDERMoTT, of Port Richmond, Staten Island, in the county of Richmond and State of New York, citizens of the United States, have invented a new and useful Improvement in Packing- Expanding Devices, of which the following is a specification, reference being had to the accompanying drawings.

Our invention relates to improvements in devices for expanding the packing of pistons and piston-valves; and the object of our invention is to provide an expanding device which will be simple in construction, economical in manufacture, and so efficient in operation as to allow the packing to be used until it is worn to almost nothing.

In the drawings illustrating the principle of our invention and the best mode now known to us of applying that principle, Figure 1 is a central sectional view of a piston valve equipped with our new expanding de- V100. Fig. 2 1s a sectional View on line 2 2 of Fig. 1. Figs. 3, 4, 5, 6, 7, and 8 are detail .views of parts of the device and are hereinafter referred to more particularly, and Fig. 9 shows a modification.

Through the center of the body portion 1 of the piston-valve extends a screw-bolt 2, threaded at both ends. Referring to the construction shown in the upper end of Fig. 1, there is threaded on the screw-bolt 2 a conical spreader 4, which is shown in eleva tion in Fig. 4 and in plan in Fig. 3. This conical spreader is designed to contact and cooperate with four segmental expanding parts 5, which are shown in plan assembled in Fig. 5 and an elevation of one of which is shown. in Fig. 6. Around the expanding parts 5 lies a split ring 6. (Shown in Figs. 7 and 8.) Over this split ring 6 lies the pack in 7. Through holes in the follower 8 pass bolts 9, which are tapped into the opposite end piece 10 and secured by nuts 11. Between the follower 8 and the body portion 1 of the piston-valve and between the body portion 1 of the piston-valve and the end piece 10 are tubular distance pieces 12, through which. the bolts 9 pass. On the screw-bolt 2 is formed integral a collar 13, adapted to fit a counterbore 1.4 in the followerS, and at its other end the screw-bolt pin on the end of the expander-bolt 2 is- -placed in its socket in the end piece 10, and

the bolts 9 are screwed into the holes tapped in the end piece. The tubular distance-pieces are passed over the upper end of the bolts 9, then the expanding parts 5 are built around the bolts 9 and the conical spreaders 4. The split rings are then put around the expanding parts 5, and the follower is put over the bolt ends and secured against the distancepieces by nuts on the end of bolts 9. The

packing is then put in place over the split rings. The distance-pieces serve to keep the follower and the end piece at a given distance from the body portion at all points.

To adjust the parts, the expander-bolt 2 is turned, and this rotation of the bolt 2 causes the conical spreaders to travel along the bolt 2 and bear against the expanding parts 5, thereby forcing these parts outwardly and so expanding the split rings and the packings surrounding them.

The expander-bolt 2 is locked in its adjusted position by a nut and nut-lock, as shown, and in any locked position of the expanderbolt 2 the collar thereon bears against the counterbored part of the follower.

In Fig. 9 is shown in central sectional view another form of my device as applied to water-pistons or steam-pistons. The studbolts 20 are shouldered and are screwed into holes tapped in the end piece 21. The follower 18 rests on shoulders on the stud-bolts 20 and is by them kept at a given distance from the end piece 21 at all points. The parts are assembled by screwing the conical spreader 4 on the expander-bolt 22 until their bottom surfaces are in the same plane. The pivot-pin then projects from below the bot tom of the conical spreader and is placed in the socket in the end piece 21. The bolts 20 1 are then screwed into the end piece 21 and parts 5 are built around them and the spreader 4. The split ring is then sprung over the parts 5 and the follower 1s threaded over the bolts 20 and secured in place by nuts. Packing is then laid over the split ring and the expander-bolt adjusted and locked in position.

. It is obvious that our new packing-expanding device is not restricted to any particular type of valve or piston or to any par ticular use thereof and may be used in steam pistons, water pistons and pistonvalves in which. it is desirable to compensate for the wear of the packing.

By means of a common screw-driver the expander-bolt 2 may be turned to adjust the conical spreader 4 and this adjustment is made without the removal of the piston, thereby saving time and labor. The screw or expander bolt 2 is steadied in position by the collar 1.3, fitting snugly in the counterbore in the follower S, as described.

What we claim is 1. In combination, a piston followerfa piston end piece; a threaded member passing through said follower and rotatably mounted in said end piece; a spreader which is mounted free to travel along said threaded member when the latter is rotated; expandible devices actuated by the movement of said spreader; and means for securing said follower and end piece together.

2. In combination, a piston follower; a piston end piece; a threaded member rotatably mounted in said end piece; a spreader which is mounted free to travel along said threaded member when the latter is rotated; expandible devices actuated by the movement of said spreader; means for securing said follower and end piece together; and means for locking said threaded member in adjusted position.

3. The combination with a piston follower and end piece and means for securing the same together, of a central screw-threaded bolt pivotally mounted in said end piece; a conical spreader screwed on said bolt; and an expandible device actuated by the movement of said spreader produced by the rotation of said screw-threaded bolt.

4. The combination with a piston follower and end piece, and means for securing the same together with their opposed faces in parallel planes, of a threaded member pivotally mounted in said end piece; a spreader screwed on said threaded member; and expandible devices actuated by the movement of said spreader produced by the rotation of said thread ed member.

5. In combination, a rotatable expander bolt; a spreader mounted free to travel along and be actuated by the rotation of said bolt; and packing-expanding devices actuated by said spreader.

the expandin 6. In combination, a rotatable expanderbolt; a conical spreader mounted free to travel along and be actuated by the rotation of piston end piece; means for securing the same together; an expander bolt which passes through said follower and is pivotally mounted in said end piece; a collar on said bolt; a spreader mounted on said bolt and actuated by the rotation thereof; expandible devices actuated by said spreader; and means for locking said bolt in adjusted position.

8. In combination, a piston-follower; a piston end piece a piston-body portion therebetween; a threaded member extending through. said body portion and pivotally mounted in said end piece; a plurality of spreaders, one on each end of said threaded member; expandible devices actuated by said spreaders; and securing means.

9. The combination with pistons secured together and an expandible device mounted in each piston, of an expander device mounted free to rotate relatively to said pistons; and a plurality of spreader devices mounted upon said device and displaced by the rotation thereof.

10. The combination with 'a piston-follower and end piece and means for securing the same together, of a central screwthreaded bolt pivotally mounted in said end piece and formed with a collar which fits into a recess formed in said follower; a conical spreader screwed on said bolt and moved lengthwise thereof by the rotation of said bolt; and an expandible device actuated by the movement of said spreader.

11. The combination with a piston-follower and end piece and means for securing the same together, of tubular washers which pass over said securing means between said follower and end piece; and expanding devices.

12. The combination with a piston and expandible devices mounted therein, of a threaded bolt mounted free to rotate in said piston, and a spreader threaded to engage the threads of said bolt and mounted to travel along said bolt when said bolt is r0- tated.

13. The combination with pistons secured together and an expandible device mounted in each piston, of a threaded bolt mounted free to rotate in said pistons, and a plurality of spreaders adapted to be driven by the rotation of said bolt in opposite directions.

EADS JOHNSON. WILLIAM MGDERMOTT. Witnesses:

T. L. BAILEY, EDWARD OPENsI-IAw. 

